Calcium Reacting with Water
Ca + 2H2O → Ca(OH)2 + H2
Aperçu
Calcium reacts with water to produce calcium hydroxide (limewater) and hydrogen gas. The reaction is moderately vigorous, producing a milky suspension of sparingly soluble calcium hydroxide. Calcium sinks in water (unlike sodium) and reacts at the bottom of the vessel.
Participants
| Rôle | Substance | Coefficient | État |
|---|---|---|---|
| Réactif | Calcium Ca | 1 | (s) |
| Réactif | Water H₂O | 2 | (l) |
| Produit | Calcium Hydroxide Ca(OH)₂ | 1 | (s) |
| Produit | Hydrogen H | 1 | (g) |
Exemple du quotidien
The milky appearance of hard water deposits and limescale is related to calcium hydroxide and carbonate formation from calcium's reactions in water.
Importance industrielle
Understanding calcium-water reactions is important for water hardness treatment, concrete chemistry, and calcium hydroxide production for industrial applications.
Propriétés
- Type
- Single Replacement
- Réversible
- Non
- Énergie
- Exothermique
- ΔH
- -635,1 kJ/mol
Réactions associées
Magnesium Reacting with Steam
Lithium Reacting with Water
Aluminum Reducing Chromium Oxide (Aluminothermic)
Iron Reacting with Hydrochloric Acid
Iron Displacing Copper from Copper Sulfate
Magnesium Reacting with Hydrochloric Acid
Copper Displacing Silver from Silver Nitrate
Iron Reacting with Copper(II) Chloride
Magnesium Reacting with Sulfuric Acid
Chlorine Displacing Iodine from Potassium Iodide
Frequently Asked Questions
What is the equation for Calcium Reacting with Water?
The balanced equation is: Ca + 2H₂O → Ca(OH)₂ + H₂.
What type of reaction is Calcium Reacting with Water?
Calcium Reacting with Water is a single replacement reaction.
Is Calcium Reacting with Water exothermic or endothermic?
Calcium Reacting with Water is exothermic (releases energy). The enthalpy change (ΔH) is -635.1 kJ/mol.